DAVID, ST (_Dewi, Sant_), the national and tutelar saint of Wales, whose annual festival, known as "St David's Day," falls on the 1st of March. Few historical facts are known regarding the saint's life and actions, and the dates both of his birth and death are purely conjectural, although there is reason to suppose he was born about the year 500 and died at a great age towards the close of the 6th century. According to his various biographers he was the son of Sandde, a prince of the line of Cunedda, his mother being Non, who ranks as a Cymric saint. He seems to have taken a prominent part in the celebrated synod of Llanddewi-Brefi (see CARDIGANSHIRE), and to have presided at the so-called "Synod of Victory," held some years later at Caerleon-on-Usk. At some date unknown, St David, as _penescoli_ or primate of South Wales, moved the seat of ecclesiastical government from Caerleon to the remote headland of Mynyw, or Menevia, which has ever since, under the name of St David's (_Ty-Dewi_), remained the cathedral city of the western see. St David founded numerous churches throughout all parts of South Wales, of which fifty-three still recall his name, but apparently he never penetrated farther north than the region of Powys, although he seems to have visited Cornwall. With the passing of time the saint's fame increased, and his shrine at St David's became a notable place of pilgrimage, so that by the time of the Norman conquest his importance and sanctity were fully recognized, and at Henry I.'s request he was formally canonized by Pope Calixtus II. about 1120.
Of the many biographies of St David, the earliest known is that of Rhyddmarch, or Ricemarchus (c. 1090), one of the last British bishops of St David's, from whose work Giraldus Cambrensis (q.v.) chiefly compiled his extravagant life of the saint.
DAVID I. (1084-1153), king of Scotland, the youngest son of Malcolm Canmore and (Saint) Margaret, sister of Edgar Ætheling, was born in 1084. He married in 1113 Matilda, daughter and heiress of Waltheof, earl of Northumbria, and thus became possessed of the earldom of Huntingdon. On the death of Edgar, king of Scotland, in 1107, the territories of the Scottish crown were divided in accordance with the terms of his will between his two brothers, Alexander and David. Alexander, together with the crown, received Scotland north of the Forth and Clyde, David the southern district with the title of earl of Cumbria. The death of Alexander I. in 1124 gave David possession of the whole. In 1127, in the character of an English baron, he swore fealty to Matilda as heiress to her father Henry I., and when the usurper Stephen ousted her in 1135 David vindicated her cause in arms and invaded England. But Stephen marched north with a great army, whereupon David made peace. The peace, however, was not kept. After threatening an invasion in 1137, David marched into England in 1138, but sustained a crushing defeat on Cutton Moor in the engagement known as the battle of the Standard. He returned to Carlisle, and soon afterwards concluded peace. In 1141 he joined Matilda in London and accompanied her to Winchester, but after a narrow escape from capture he returned to Scotland. Henceforth he remained in his own kingdom and devoted himself to its political and ecclesiastical reorganization. A devoted son of the church, he founded five bishoprics and many monasteries. In secular politics he energetically forwarded the process of feudalization which had been initiated by his immediate predecessors. He died at Carlisle on the 24th of May 1153.